I just started my freelance photography business I need advice!?

[MHK]

Hi there so I just started my freelance photography business and I just need help figuring out a way to advertise/get more clients. I want to target the local high schools to do prom pictures and senior portraits, but I have no idea how since I am not in high school anymore. I am in the East Bay Area I've had years of experience and it's a hobby of mine. I am hoping to find clients to take pics for baby showers, small events, family portraits, senior pics, and more. Yes, I have already made a Facebook and it isn't really helping because I don't know many people. Also the money I get I use for college so I really need help please since the semester begins soon!
So what do you suggest I do to get more clients?